STFUMy uncle works for Mazda and I have an early prototype. I can't give you any specifics because he signed an NDA as well as me. I can tell you it's a really fun/fast Miata! I also have a PS4 as my uncle works for Sony on the side. I'd love to give you details, but I can't.
Gah I hope this is wrong. 1.3 is so small. There will be no tuning this thing. Buying exhaust and intakes chasing 2-3hp will suck. I mean, I'm sure it will be fun stock if you weigh <150lbs, have no friends for passengers, and carry nothing with you. Here's to hoping the new motors are built like legos (like Honda).